Work at an LFS that sells fishpods.
The lights are great for plant growth, just leave the blue and white on on together. If you don't like the colour rendition just buy another white one instead, or you can even get other cheaper bulbs that fit off the net that have different K ratings.
The lights are just screw-in energy saving bulbs, they have their own little ballast in them, they shouldn't hum at all so I suspect it's something else that's creating the humming.
They are nice little solid tanks, would be easy to set one up for multies, chuck in some shells and a couple of tough plants .